Dell OptiPlex 740 Quick Reference Manual page 43

Light Pattern Problem Description
A possible graphics card failure has
occurred.
A possible floppy or hard drive failure has
occurred.
A possible USB failure has occurred.
No memory modules are detected.
Memory modules are detected, but a
memory configuration or compatibility
error exists.
Suggested Resolution
• If the computer has a graphics card,
remove the card, reinstall it, and then
restart the computer.
• If the problem still exists, install a
graphics card that you know works and
restart the computer.
• If the problem persists or the computer
has integrated graphics, contact Dell.
Reseat all power and data cables and
restart the computer.
Reinstall all USB devices, check cable
connections, and then restart the
computer.
• If you have one memory module
installed, reinstall it and restart the
computer (see the online User's Guide
for instructions on how to remove and
install memory modules).
• If you have two or more memory
modules installed, remove the modules,
reinstall one module, and then restart
the computer. If the computer starts
normally, reinstall an additional module.
Continue until you have identified a
faulty module or reinstalled all modules
without error.
• If available, install properly working
memory of the same type into your
computer.
• If the problem persists, contact Dell.
• Ensure that no special memory
module/memory connector placement
requirements exist.
• Verify that the memory modules that
you are installing are compatible with
your computer.
• If the problem persists, contact Dell.
Quick Reference Guide
43